Main Entry: al·lot·ro·py Pronunciation: &-'lä-tr&-pE Function: noun Inflected Form: plural-pies : theexistence of a substance and especially an element in two or more different forms (as of crystals) usually in the same phase —al·lo·trop·ic/"al-&-'träp-ik/adjective —al·lo·trop·i·cal·ly/-i-k(&-)lE/adverb
allotropism al·lot·ro·pism (ə-lŏt'rə-pĭz'əm) or al·lot·ro·py (-rə-pē) n. The existence of two or more forms of an element that differ from one another in crystalline or molecular structure.